Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.
Marginal VFR conditions (%)
Month
Average
2024
2023
2022
2021
2020
January
72.9
70
68
87
76
74
February
56.7
54
49
73
70
50
March
75.4
0
96
55
72
75
April
93.6
100
89
98
94
98
May
94.4
100
90
96
100
100
June
87.6
93
86
81
98
81
July
79.6
80
94
74
75
57
August
65.2
71
74
55
64
52
September
80.9
87
79
85
76
October
86.7
86
90
80
November
89.7
80
98
100
84
December
85.0
88
94
63
83
Average
80.2
74.9
81.4
80.4
79.1
74.5
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
30.0
32
31
28
32
27
February
30.8
33
32
29
31
30
March
34.0
33
34
35
34
34
April
33.1
37
34
32
33
34
May
32.0
33
34
30
32
28
June
29.0
30
30
28
29
28
July
27.6
29
30
27
27
27
August
26.5
27
28
26
27
25
September
28.1
30
28
29
28
October
30.5
32
30
30
November
31.6
33
33
34
31
December
30.9
32
32
29
32
Average
29.5
30.3
31.6
29.8
30.2
29.6
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
18.5
18
18
18
19
19
February
20.7
21
19
21
21
21
March
24.9
33
24
25
25
24
April
26.5
32
25
28
28
25
May
25.5
26
23
28
25
28
June
23.7
25
22
23
25
24
July
22.5
22
22
21
23
23
August
21.9
22
22
21
21
22
September
21.8
23
21
21
22
October
22.6
25
20
22
November
21.5
24
18
22
21
December
19.7
18
17
23
20
Average
23.0
21.9
22.0
21.3
22.8
21.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.2
0
0
1
0
0
April
0.0
0
0
0
0
0
May
0.0
0
0
0
0
0
June
0.9
0
1
4
0
0
July
2.9
5
1
2
6
0
August
7.0
6
5
14
3
7
September
2.5
2
5
0
3
October
0.0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
2.0
2.3
0.6
2.9
0.9
0.7
Precipitation during daylight period
Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.
Wind speed (knots)
Month
Average
2024
2023
2022
2021
2020
January
9.7
10
10
10
9
10
February
10.0
10
11
10
8
11
March
7.0
0
6
8
8
7
April
6.8
6
7
7
7
6
May
7.2
8
7
7
7
4
June
6.7
7
7
7
6
6
July
7.0
8
6
8
7
6
August
7.0
8
7
7
6
7
September
5.0
5
5
4
5
October
6.2
6
6
6
November
8.0
8
9
10
8
December
8.6
9
9
10
8
Average
7.1
8.4
7.6
7.6
7.2
7.3
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
058°
066°
054°
057°
059°
February
059°
056°
058°
061°
058°
March
360°
076°
073°
062°
077°
April
180°
245°
223°
118°
219°
May
221°
224°
216°
219°
194°
June
205°
211°
204°
197°
215°
July
225°
209°
215°
213°
226°
August
219°
209°
221°
218°
225°
September
185°
206°
205°
213°
October
063°
051°
069°
November
058°
060°
066°
056°
December
058°
059°
053°
062°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.